Frederick george seiicarth



June 24 1924.

F. G. SEIFARTI'H ROLLER BEARING Original Filed July 14 192s 294 53 1 111 5 1 m WM 7 ml r W ,1 Z ,3

' mg of the hearing as to destroy the lubricant Reissued June 24, 1924 I UNITED STATES ranmmrcx GEORGE SEIEARTH, or cmcaeo,

MESNE ASSIGNMENTS, TO PRECISION DISK ROLLER BEARINGS COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ROLLER BEARING.

Original No. 1,487,185, dated March is, 1924, serial-No. 651,!314, filed July reissue filed April 24, 1924. Serial No. 708,88.

[0 all whom it may concern:

Be it known that l. l nnnnurou (inonoi: SElFARTl-I. a citizen of the United States, and a resident of (hit-ago, in the county'ot Cook and State oi Illinois, have invented certain new and useful ln'iprovements-in :1 Roller Hearing. of which the following is a full. clear. and exact description.

My present invention relates to anti friction bcariugs and has more particular reference to that form of anti-friction bearings in which disk rollers are employed as the anti-friction elements between the cone and cup. or inner and outer relatively to tatingj parts.-

\Vhen disks or cylinders are employed as anti-friction elements in such hearings in an angular relation to the axis of rotation there is a difference in the length of the roller paths as they rccede from the axis of rotation. As the rollers are solid and must. rotatiuniformly the differential above alluded to develops friction between the rollers and the surfaces with which they contact. it has heretoforebeen sought to overcome this dill'erential and resultant friction, first, by tapering the rollers, and second, by reducing the thickness of the rollers so as minimize the differential and friction. Such narrowing of the rollers is effective where the rate of revolution is comparatively slow, as the heat developed by the friction radiates as fast as it is generated. but with high speeds of rotation, such as are becoming constantly more generally demanded in engineering practice, the presence of an appreciable dicrential results in such a heatand lead to a quick destruction of the entire hearing.

I have found that inhigh speed bearimrs theditlerential' between the rollers and the inner hearing member or cone is of much less importance than the differential between the rollers and the outer bearing member or cup, probably because of the centrifugal efl'ect. My present invention overcomes the differential and resultant friction between the rollers and the outer bearing member or cup b forming the cup with slightly crowned or convex roller paths which reduce the contact between the roll ai and the outer bearing member or cup lnurl: nearly to a 14, 1923. Application to:

line, dependin uggn the convexity 01 the paths provider. hile the securing of a line contact for the disk roller elements is peculiarly desirable with high-speed bearing-s it is also of advantage in all classas of roller hearings on account of the elimination of such differential which at no time is of any advantage. Another important advantage of my present form of bearing lies in the fact that the rotation (if the rollers upon their crowned or couvexed tracks or paths develops a spinning action which tends to compress and solidify the track instead of merely ahrading thesame so thatmy -form of bearing continually improves throughout a reasonable length of service. j r

. I prefer to carry out my invention in substantially the manner hereinafterfully described and as more particularly pointed out in the claims, reference being, now had to the uecom anying drawings that form a part of this specification, in which- Figure l is a fragmental axial section ofmy improved hearing drawn schematically.

Figure 2 is an. axial section showing the.

structure in detail. v

Figure 3 is an edge view partly broken away.

Flgure 4 is a detail of the cone.

Flfillle 5 is a fragmentof arollerifiiic'ing mem ,r. I The cone or inner bearing member 5 of my improved bearing is shouldered or annularly flanged. as at 6 near. oneend, the flange being recessed at a plurality of'points 7. The inner member 5 may be 1; ounces above or a cylinder if desired. Fitting over 't rinner beari against the shoulder or Range-{S is dawns 'r 8 with lateral tangs 9 auapted to entertlw recesses 7 in the flange. -lh'e washer 8 is to be so formed ash) stand at substantially a right angle to the bearing surface 10 of the cone or other antral immbearing' member. I next provide roller-spacers consisting of rings 11 of a size'to permit of the rojection of the rollers 19 both within and without the same when they are oriented with the bearing members. These rings 11 are pro 1mm of the vided with spaced tangs 1.2 each disposed.

ILLINOIS. ASSIGNOR. BY DIRECT AND parting rollers. The planes of the rings 11 should be parallel with the plane of the Washer 8 before mentioned. When a. set of rollers 19 with a spacer have been placed upon the cone a circumferential series of roller elements will be provided therefor. It is apparent that any desired number of rollers and spacers may be provided depending upon the thickness of the rollers'and'the width of the bearing surface 10 of the cone. The end of the cone 0 posite to that provided with shoulder or fiimge 6 is provided with a circumferential groove 13 and the rollers and spacers assembled on the cone are re tained therein by a Washer 14 and a'split spring ring 15 which latter is snapped into the groove 13. r The washer 1 1 should, of course, have the same angular relation to the axis of rotation as that of the washer 8.

The outer. or cup bearing member 16 differs from the conventional cup member in that its inner wall or hearing face is channeled at 17 to provide roller paths 18 of con Jex section. lVith conical hearings or bean ings in which end-thrust develops it is desirable to have the crest of the curve 'so dis.- posed that the end-thrust will press the roller toward the crestthereby developing the spinning and solidifying action hereinbefore alluded to. I 7

While I have herein illustrated and described but a single specific form of my inyentionit will be obvious to others skilled in the art that di ers modifications and refinements thereof are possible without defrom the principles involved. I therefore desire it understood that all such changes or alterations are fully contemplated as coming within the scope of the appended claims.

What I claim is 1. An anti-friction bearing comprising in ner and outer bearing members, a plurality of groups of disks, the disks of each group arranged in series and interposed between said members, and annular rctai ners a rra nged back to oack between the respective groups of disks and having lateral elements projecting in opposite directions to space the disks in the respective series, one of said bearing members having convex faces to contact separately with a portion of the periphery of each disk and the other bearing member having a straight face to contact with all of the periphery of each disk.

ing

a 2. An antifriction bearing comprising in" nor and outer bearing members, a plurality of groups of disks, the disks of each group arranged in series and interposed between said members, and annular retainers arranged back to back between the respective groups of disks and having lateral elements projecting in opposite directions to space the disks in the respective series, said outer bearing member having convex faces to contact a portion of the periphery of each disk and the inner bearing member being conical to engage the entire periphery of each disk.

3. An anti friction bearing comprising inner and outer bearing members, a plurality of groups of disks, the disks of each group arranged in series and interposed between said members, and annular retainer-shaving lateralelements to space the disks in the respcctive series, one of said bearing members having convex faces to contactseparately with a portion of the periphery of each disk and the other bearing member having a straight face to contact with all of the pcriphery of each disk.

4. An anti-friction bearing comprising inner and outer bearing members, a plurality of groups of disks, the disks of each group arranged in series and interposed between said members, and annular retainers having lateral elements to space the disks in the respective series, said outer bearing, member having convex faces to contact a portion of the periphery of each disk and the inner bearing member being conical to engage the entire periphery of each disk. 4

5. An anti-friction bearing comprising a conical bearing member, an annular bearing member surrounding said conical'member, a plurality of disks arranged in successive order and interposed between said conical and annular members, one of said bearing members having a convex face to contact with a portion of the width of the rolling face of each disk and the other bearing member having a straight 'face to contact the entire Width of the rolling face of each. disk, an annular retainer having lateral elements to space the disks, and means for maintainthe disks and retainer in assembly'.

Signed at Chicago, county of Cook, and

s are of 111111015 this 21st day of April, 1924.

riisnamcx GEORGE SElPARTH. 

